SYNDAX PHARMACEUTICALS INC

Ticker: SNDX CUSIP: 87164F105 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 168 Value ($000) $4 Avg Close $17.45 Range $12.99 - $22.73

Q3 2025

Shares 719 Value ($000) $11 Avg Close $13.09 Range $8.59 - $17.24

Q2 2025

Shares 511 Value ($000) $5 Avg Close $11.01 Range $8.58 - $14.24

Q1 2025

Shares 271 Value ($000) $3 Avg Close $14.10 Range $12.06 - $16.95

Q4 2021

Shares 5,147 Value ($000) $98 Avg Close $18.48 Range $14.76 - $22.71

Q3 2021

Shares 5,147 Value ($000) $98 Avg Close $16.66 Range $13.58 - $20.32

Q2 2021

Shares 9,140 Value ($000) $157 Avg Close $18.32 Range $13.02 - $25.46

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	168	$4	$17.45	$12.99 - $22.73
Q3 2025	719	$11	$13.09	$8.59 - $17.24
Q2 2025	511	$5	$11.01	$8.58 - $14.24
Q1 2025	271	$3	$14.10	$12.06 - $16.95
Q4 2021	5,147	$98	$18.48	$14.76 - $22.71
Q3 2021	5,147	$98	$16.66	$13.58 - $20.32
Q2 2021	9,140	$157	$18.32	$13.02 - $25.46